title: Structural effects on the photodissociation of alkoxyamines.
abstract: The search for photosensitive alkoxyamines represents a huge challenge. The key parameters governing the cleavage process remain unknown. The dissociation process of light sensitive alkoxyamines is studied as a function of their chemical structures. The photochemical properties of 6 selected compounds are investigated by ESR and laser flash photolysis. It is found that (i) the selectivity of the cleavable N-O vs. C-O bond and (ii) the efficiency of the nitroxide formation are strongly related to the alkoxyamine structure. The distance between the chromophore and the aminoxy group is a key parameter for an efficient pathway of the radical generation as displayed by the photopolymerization ability of these alkoxyamines.
authors.affiliation: Département de Photochimie, CNRS, Université de Haute Alsace, ENSCMu, 3 rue Alfred Werner, 68093, Mulhouse, Cedex, France.
authors.forename: Davy-Louis
authors.initials: DL
authors.lastname: Versace
authors.forename: Yohann
authors.initials: Y
authors.lastname: Guillaneuf
authors.forename: Denis
authors.initials: D
authors.lastname: Bertin
authors.forename: Jean Pierre
authors.initials: JP
authors.lastname: Fouassier
authors.forename: Jacques
authors.initials: J
authors.lastname: Lalevée
authors.forename: Didier
authors.initials: D
authors.lastname: Gigmes